33results about How to "No follow-up" patented technology

Disclosed is a preparation method of a hexagon snow shaped WO3 nanometer disc. Firstly, tungsten powder is added into hydrogen peroxide solution, after the reaction is finished, filtrate in a beaker is collected and labeled as solution A. Deionized water is added into the solution A and the solution A is diluted to obtain solution B; the solution B is poured into a microwave hydrothermal reactor, and then is put into a MDS-8 type temperature-pressure double control microwave hydrothermal reaction machine. The temperature control mode is selected for reaction, after the reaction is finished, the solution B is cooled to the room temperature naturally. The hydrothermal reactor is opened, after the product is centrifugated, supernatant is removed and precipitate is collected, then the product is rinsed a plurality of times by using deionized water and absolute ethanol or deionized water and isopropanol, at last the product is soaked in absolute ethanol, and is dried in an electrothermal blowing dry box, then the snow shaped WO3 nanometer disc is obtained. The reaction of the invention is finished by one step, the subsequent treatment is not needed, the preparation period is short, and the process equipment is simple, the cost is low, the repeatability is high, the reaction temperature is low, the energy consumption is low and the production cost is saved.

The invention relates to a spherical filler modifying material formula. The material comprises a base material and a modifying agent. The base material is any one selected from nylon 6, polyphenylene sulfide, polyether ether ketone, and nylon 11. The modifying agent is any one selected from carbon fiber, carbon nano-tubes, carbon black, or thermal-conductive electric-conductive plastic. According to different market application and demands, the spherical filler modifying material is derived into a series of products with different structures and components, wherein different base material and modifying agent ratios are adopted. When the spherical filler modifying material provided by the invention is used for producing spherical hollow fillers, compared with explosion-proof materials with polyurethane foamed materials and metal foil grid structures, the production of residues such as scraps is prevented, pollution phenomena such as oil oxidation is prevented, subsequent influence is prevented, and service life is long. The filler is easy to fill, to disassemble, and to wash. Installation and maintenance costs are low. The filler is especially suitable for vessels with complicated internal space or small local space, and vessels which are hard to fill by using the polyurethane foamed material and metal foil grid structured explosion suppression materials.

The invention belongs to the technical field of polymer foam materials, and particularly relates to a flame-retardant polyurethane foam preparation method, which comprises: 1, adding polylol into a reaction kettle, adjusting the pH value to 7-13, and heating to achieve a temperature of 50-90 DEG C; 2, adding paraformaldehyde, maintaining the constant temperature for 10-40 min, and carrying out depolymerization and dissolving on paraformaldehyde under an alkaline condition; 3, adding an amino-based substance, controlling the reaction temperature at 50-100 DEG C, and carrying out a reaction for60-180 min; 4, adjusting the pH value to 2-7, and carrying out a condensation and etherification reaction for 20-50 min; and 5, adjusting the pH value to 7-13, adding a modifier, controlling the reaction temperature at 60-100 DEG C, and carrying out a reaction for 90-200 min to obtain the flame-retardant polyol. According to the present invention, the flame-retardant polyurethane foam material prepared through the preparation method has advantages of high compressive strength, good flame retardant effect and the like, and has good application prospects in industry, daily life, architecture andother external wall thermal insulation material markets.

The invention provides titanium dioxide with a high-energy surface hollow structure, which is characterized in that metal titanium powder and hydrogen fluoride are directly reacted with an aqueous solution of hydrogen peroxide to obtain titanium dioxide which possesses the hollow structure and is formed by high-energy surface flake particle reunion with particle size of 1-3 micrometers, a preparation method comprises the following steps: mixing hydrofluoric acid and the hydrogen peroxide solution according to proportion of 1-20:30-600, adding the metal titanium powder in the mixed solution, wherein the addition is that every milliliter mixed solution adds 0.006-0.12g metal titanium powder, stirring for 5 minutes; and adding deionized water in the stirred mixed solution according to proportion of 1-20:9-180, putting into a teflon-lined hydrothermal autoclave, reacting for 4-40 hours at the temperature of 160-200 DEG C, washing by deionized water and drying. The present invention enables simple method without a templating agent or a surfactant and further treatment, and is easy to recycle and use in practical application; the invention has the advantages of novel structure, structured size and well crystallization.

The invention belongs to the technical field of preparation of carbon quantum dot materials, and discloses a method for synthesizing solid carbon quantum dots by gaseous detonation. The method comprises the following specific steps: taking citric acid as a carbon source, taking urea as a nitrogen source, mixing the two substances and tiling into a gaseous detonation tube; sealing the gaseous detonation tube and then vacuumizing; simultaneously heating the gaseous detonation tube to 60 DEG C or above; respectively filling the inner part of the gaseous detonation tube with hydrogen and oxygen asa detonation source; stopping heating the gaseous detonation tube and detonating hydrogen and oxygen mixed gas in the tube; after the gaseous detonation tube is cooled to 80 DEG C or less, opening the gaseous detonation tube and collecting yellow solid on the tube wall, namely the solid carbon quantum dots. The method has the advantages of simplicity, high efficiency, no need of subsequent processing and capability of synthesizing the solid carbon quantum dots on a large scale. The solid carbon quantum dots synthesized by the method disclosed by the invention do not need any matrix, and can emit fluorescence directly under the excitation of an ultraviolet lamp.

The invention discloses a method for preparing biochar / carbon nano-tubes for cathode materials for sodium ion batteries. The method includes (1), washing pomelo peel, clearing impurities on the surfaces of the pomelo peel and cutting the pomelo peel to obtain uniform pieces A; (2), carrying out freeze drying on the uniform pieces A to obtain pieces B; (3), adding concentrated sulfuric acid into the pieces B, then adding carbon nano-tubes into the pieces B, carrying out ultrasonic treatment on the pieces B, then arranging the pieces B in homogenous-phase equipment and carrying out homogenous-phase reaction to obtain reaction products C; (4), carrying out suction filtration on the reaction products C, drying the reaction products C, then shifting the reaction products C into a tube atmosphere furnace and carbonizing the reaction products C to obtain carbonization products D; (5), respectively carrying out soaking, washing and suction filtration on the carbonization products D by the aid of deionized water and absolute ethyl alcohol and then drying the carbonization products D to obtain the cathode materials for the sodium ion batteries. The cathode materials are of three-dimensional nano-tube structures. The method has the advantages that the biochar / carbon nano-tubes prepared by the aid of the method are homogenous in composition and high in purity and are of the three-dimensional nano-tube structures, sodium ion diffusion paths can be effectively shortened by the three-dimensional nano-tube structures, and accordingly the capacity and the cyclic stability of the sodium ion batteries can be improved.

The invention discloses an improved process method for preparing 5-chloroindanone, and belongs to the technical field of organic synthesis. The method comprises the following steps: mixing chlorobenzene with anhydrous aluminum trichloride, adding 3-chloropropionyl chloride, and carrying out Friedel-Crafts acylation reaction to obtain 3,4'-dichloropropiophenone; then carrying out catalytic cyclization under the condition of anhydrous aluminum trichloride / sodium chloride or tri(pentafluorophenyl)borane; and after the reaction is finished, washing the product with water and directly rectifying the product to obtain the 5-chloroindanone. According to the process disclosed by the invention, the direct distillation is performed after water washing, so that no subsequent operation is performed, the operation steps are reduced, the production time is shortened, the production cost is saved, the extraction effect of the product is greatly improved, the yield of the product is improved by 15% or above, low-boiling-point substances and high-boiling-point substances can be effectively removed through direct distillation, and the content of the product is improved to 99.5% or above; meanwhile, cyclization is carried out under catalysis of tri(pentafluorophenyl)borane, so that the total dosage of aluminum trichloride can be reduced, the cyclization reaction temperature is reduced, the generation of tar is reduced, and the yield of the product is improved.

The invention belongs to the technical field of soil remediation, and particularly relates to a method for remediating heavy metal contaminated soil by a cyclodextrin reinforced modifier. The method comprises the following steps of: (1) adding the cyclodextrin reinforced modifier into the contaminated soil according to a weight ratio of 1:(8-10), uniformly mixing the substances, and regularly performing watering to keep the soil moist; and (2) setting a passivation period of 2-4 months, and periodically determining the content of DTPA extractable heavy metals in the soil within 120 days of passivation remediation. The efficient adsorption and enrichment effects of cyclodextrin on heavy metals are fully utilized, the passivation effect on the heavy metals in the contaminated soil is enhanced, and the remediation efficiency of the heavy metal contaminated soil is improved.

The invention discloses an auger bit with abrasion resistance and toughness. The auger bit includes an abrasion-resistant head, a bit body and a bit handle from top to bottom in sequence. The bit bodyand the bit handle are formed integratedly. The lower end of the abrasion-resistant head is inlaid in an abrasion-resistant head groove of the top end of the bit body. An alloy reinforcing micro-region is arranged on the surface of the bit body. The alloy reinforcing micro-region is formed by a micro-molten pool wrapping enhanced phase particles in the micro-molten pool in the subsequent rapid cooling and solidifying process, wherein the micro-molten pool is formed by laser melting a bit body base material. A preparing method comprises the steps that (1) raw material forging, (2) bit body vehicle outer round step, (3) abrasion-resistant head groove drilling at the top end of the bit body, (4) abrasion-resistant head brazing, (5) heat treatment, (6) shot blasting, (7) spring clamping, (8)rust removing treatment, and (9) alloy reinforcing micro-region forming on the surface of the bit body. The auger bit has surface high abrasion resistance and meanwhile further maintains overall toughness of the auger bit base material.

The invention discloses a rotary excavating tooth body surface strengthening laser dispersion alloying method. The method comprises the following steps that (1) a rotary excavating tooth obtained after surface treatment is clamped in a chuck of a laser machining machine tool, and wild phase powder is contained in a powder feed device; and (2) the height direction of a rotary excavating tooth body is used as the feed direction of a laser head of a laser device, the laser head emits lasers, the powder feed device synchronously feeds powder, the feed speed of the laser head cooperates with the speed of rotation of the rotary excavating tooth driven by the chuck, a micro melting pool is formed on the surface of the rotary excavating tooth body according to a preset motion track, the micro melting pool coats wild phase particles in the subsequent fast cooling and solidifying process, and an alloy strengthening micro area is formed. According to the method, the toughness of a rotary excavating tooth base material can be kept, and meanwhile the surface wear resistance of the tooth body can be improved.

The invention provides a system for separating concrete with different strength grades in a beam-column joint core area and application. The beam-column joint core area further comprises a horizontally-arranged beam formwork and a plurality of beam ribs arranged in the beam formwork. The separating system comprises air inflation rods, an air pipeline, an air compressor, a fixing piece and a limiting frame. Each air inflation rod is in a long strip shape and comprises an air bag and an air nozzle, the air bags are connected with the air nozzles, the air nozzles are detachably connected with one end of an air pipeline, and the other end of the air pipeline is connected with the air compressor. The limiting frame is arranged on the beam-column joint core area, is positioned above the beam formwork and is used for separating and limiting the concrete with different strength grades; the multiple air inflation rods are inserted in parallel on the beam formwork on the outer side of the limiting frame, and are fixed to the beam ribs through fixing pieces; and the lengths of the air inflation rods are greater than the depth of the beam formwork. The system for separating the concrete with different strength grades in the beam-column joint core area has the advantages of simple on-site construction operation, reusability, cost saving and the like.

The invention relates to a composition for detecting mycobacterium tuberculosis and / or brucella. The composition includes primers and probes for detecting mycobacterium tuberculosis and / or brucella, wherein the primers include the sequences shown in SEQ ID NO.1-SEQ ID NO.4, and the probes include the sequences shown in SEQ ID NO.5-SEQ ID NO.6. The invention further relates to a kit comprising thecomposition and application of the composition. The kit performs amplification product detection in a closed-tube state, so that false positives caused by contamination of an amplification product isavoided; the probe hybridization specificity is higher; the detection of the two bacteria of mycobacterium tuberculosis and / or brucella can be simultaneously achieved, the detection time is greatly shortened, and the detection cost is reduced; and after PCR is carried out, no subsequent processing is required, the operation is simpler and faster, safe and pollution-free, the detection is high in specificity, sensitive, fast and safe, and the detection effect on samples containing trace amounts of mycobacterium tuberculosis and / or brucella genomes is good.

The invention relates to a murine cytomegalovirus real-time fluorescent quantitative PCR detection method comprising the following steps of: standard plasmid construction, specific primer and fluorescent probe design, real-time fluorescent quantitative PCR amplification and detection standard curve establishment, RNA extraction of an infected virus sample, cDNA preparation and validity verification and result detection judgment, wherein the sequence of a forward primer of a specific primer is shown as follows: 5'-AGCGTCGATGCAGGGGCTTT-3', and the sequence of a reverse primer thereof is shown as follows: 5'-CGGCGGAACGGGGGCTGGTA-3'; and the sequence of a fluorescent probe is shown as follows: 5'-CGGGGGCGTTCCGAAAACGA-3'. The invention has the advantages of high detection sensitivity, short detection time, good specificity, sensibility, repeatability and stability, can be simultaneously used for carrying out sample analysis on a large scale and is suitable for the early diagnosis of virus infection.

A construction method for simultaneously casting two structure columns at a deformation joint comprises the steps that an integrated steel formwork for the two structure columns is customized; two bayonets are arranged at the center position of the inner side face of each side formwork; each inner formwork is customized and is disconnected from the middle, and the disconnected portions are connected through hinges; two structure column steel reinforcement cages are bound on the surface of a bearing platform, two end formworks and a side formwork are installed outside the steel reinforcement cages; two inner formworks are inserted into a gap between the two steel reinforcement cages; a plate-shaped air cushion is inserted into the gap between the two inner formworks; the other side formwork is installed; the air cushion is fully aerated; and concrete of the two structure columns is poured at the same time. The construction method for simultaneously casting the two structure columns at the deformation joint has the beneficial effects that the construction process of the two structure columns can be completed through one-time casting, and therefore the work efficiency can be greatly improved; a chemical solvent is not needed, so that the health of operation personnel cannot be harmed, and environmental protection is facilitated; and the surfaces of the structure columns are flat, follow-up treatment is not needed, and the construction method is convenient and rapid to execute.

The invention aims to provide a Ni3Fe-coated C nanocapsule-loaded multi-layer graphite lamellar structure with N doping defects and a preparation method of the Ni3Fe-C nanocapsule-loaded multi-layer graphite lamellar structure. The Ni3Fe-coated C nanocapsule-loaded multi-layer graphite lamellar structure is prepared by adopting a high-temperature plasma arc evaporation technology, a high-purity graphite rod serves as a cathode, a high-purity Fe powder, high-purity Ni powder and high-purity graphite powder mixed block serves as an anode, and after an electric arc furnace is vacuumized, and acetonitrile or acetonitrile and N2 are introduced, and after the plasma arc discharge is finished, the sediment on the inner wall of the reaction cavity is collected to obtain the Ni3Fe-coated C nanocapsule compound uniformly dispersed on the wrinkled N-doped nanosheet graphite of a large lamella. The product can be massively prepared by utilizing a simple and harmless high-temperature plasma arc evaporation method without any reaction gas, the doping of the N element enables the nanosheet layer graphite to become disordered and full of a large number of defects, the nanosheet layer graphite is induced to generate new performance, good electromagnetic matching is formed together with a Ni3Fe-coated C soft magnetic phase, and therefore, wide application to the fields of wave absorption, corrosion prevention and the like can be achieved.

The invention discloses a method for preparing biochar / carbon nano-tubes for cathode materials for sodium ion batteries. The method includes (1), washing pomelo peel, clearing impurities on the surfaces of the pomelo peel and cutting the pomelo peel to obtain uniform pieces A; (2), carrying out freeze drying on the uniform pieces A to obtain pieces B; (3), adding concentrated sulfuric acid into the pieces B, then adding carbon nano-tubes into the pieces B, carrying out ultrasonic treatment on the pieces B, then arranging the pieces B in homogenous-phase equipment and carrying out homogenous-phase reaction to obtain reaction products C; (4), carrying out suction filtration on the reaction products C, drying the reaction products C, then shifting the reaction products C into a tube atmosphere furnace and carbonizing the reaction products C to obtain carbonization products D; (5), respectively carrying out soaking, washing and suction filtration on the carbonization products D by the aid of deionized water and absolute ethyl alcohol and then drying the carbonization products D to obtain the cathode materials for the sodium ion batteries. The cathode materials are of three-dimensional nano-tube structures. The method has the advantages that the biochar / carbon nano-tubes prepared by the aid of the method are homogenous in composition and high in purity and are of the three-dimensional nano-tube structures, sodium ion diffusion paths can be effectively shortened by the three-dimensional nano-tube structures, and accordingly the capacity and the cyclic stability of the sodium ion batteries can be improved.

Disclosed is a preparation method of a hexagon snow shaped WO3 nanometer disc. Firstly, tungsten powder is added into hydrogen peroxide solution, after the reaction is finished, filtrate in a beaker is collected and labeled as solution A. Deionized water is added into the solution A and the solution A is diluted to obtain solution B; the solution B is poured into a microwave hydrothermal reactor,and then is put into a MDS-8 type temperature-pressure double control microwave hydrothermal reaction machine. The temperature control mode is selected for reaction, after the reaction is finished, the solution B is cooled to the room temperature naturally. The hydrothermal reactor is opened, after the product is centrifugated, supernatant is removed and precipitate is collected, then the productis rinsed a plurality of times by using deionized water and absolute ethanol or deionized water and isopropanol, at last the product is soaked in absolute ethanol, and is dried in an electrothermal blowing dry box, then the snow shaped WO3 nanometer disc is obtained. The reaction of the invention is finished by one step, the subsequent treatment is not needed, the preparation period is short, andthe process equipment is simple, the cost is low, the repeatability is high, the reaction temperature is low, the energy consumption is low and the production cost is saved.

The invention belongs to the technical field of biology, and particularly relates to a primer probe set and a kit for detecting FPV through an RAA fluorescence method.The primer probe set can detect more FPV genotypes after degeneracy design, compared with other primer probe sets, it is found that the primer probe set has the advantages of being high in sensitivity and better in detection effect, and meanwhile the primer probe set can be used for detecting the FPV genotypes. The invention also prepares a corresponding RAA kit and establishes a corresponding RAA detection method, tests show that the kit can be carried out under a constant temperature condition (37-42 DEG C), can realize rapid and qualitative detection of the feline parvovirus within 5-30 min, has the characteristics of convenience in operation, strong specificity, high sensitivity and good repeatability, and can completely meet the requirements of rapid diagnosis of the feline parvovirus, rapid diagnosis of the feline parvovirus, rapid diagnosis of the feline parvovirus, rapid diagnosis of the feline parvovirus, rapid diagnosis of the feline parvovirus, rapid diagnosis of the feline parvovirus and rapid diagnosis of the feline parvovirus. The kit is suitable for clinical rapid detection and has a wide application prospect.

The invention provides a preparation method of a nitrile group-containing epoxy resin toughening agent. The method comprises the following steps: 1, weighing 40-60 parts by weight of aliphatic diamine and 30-50 parts by weight of acrylonitrile, and respectively stirring and reacting at room temperature and 60-80 DEG C for 1-2 hours to obtain acrylonitrile modified aliphatic amine; and 2, weighing 40-50 parts by weight of acrylonitrile modified aliphatic amine and 35-50 parts by weight of 1, 6-hexanediol diacrylate, and respectively stirring and reacting at room temperature and 60-80 DEG C for 1-2 hours to obtain the nitrile group-containing epoxy resin toughening agent. The preparation method disclosed by the invention is based on addition reaction polymerization, the reaction process has the advantages of no solvent, high yield, no subsequent treatment, autocatalysis, no introduction of other impurities and the like, and the prepared toughening agent is low in viscosity and excellent in epoxy resin toughening performance.

The method of using organic acid wastewater to prepare biomass hydrothermal coke, according to the method, the biomass and organic acid wastewater are fully mixed in a mass ratio of 1:10 to 30, and every 3 to 5 hours at room temperature, after 50 ~ 500r / min mixer stirring for 5 ~ 10 minutes, after 12 ~ 24 hours, through 5000 ~ 10000r / min pulverizer treatment for 10 ~ 15 minutes, sent to the reaction kettle, and into the kettle into the CO 2 Evacuate the air, use infrared heating with a wavelength of 5-16 μm, the reaction temperature is 250-300 ° C, the reaction time is 180-240 minutes, and the pressure is at least the saturation pressure of water corresponding to the reaction temperature. After the reaction is completed, squeeze and separate , to obtain extremely low ash porous hydrothermal coke. The invention makes full use of the organic acid waste water to effectively remove the ash content of the biomass in the hydrothermal carbonization process, and simultaneously activates the hydrothermal coke, with simple process, low energy consumption and less emission.

The invention aims to provide a preparation method of an N-doped nano lamellar graphite structure or an N-doped nano lamellar graphite structure loaded with Fe2O3 nanoparticles on the surface. A high-temperature plasma arc evaporation technology is adopted for preparation. A high-purity graphite rod is used as a cathode, a high-purity graphite rod or a mixed block of high-purity Fe powder and high-purity graphite powder is used as an anode, after the electric arc furnace is vacuumized, acetonitrile is introduced to serve as a carbon source and a nitrogen source, and after plasma arc dischargeis finished, sediments on the inner wall of a reaction cavity are collected to obtain wrinkled N-doped nano lamellar graphite of a large sheet layer, or Fe2O3 nanoparticle compounds are uniformly dispersed on the wrinkled N-doped nano lamellar graphite of the large sheet layer. A large number of the products can be prepared by using a simple and harmless high-temperature plasma arc evaporation method without any reaction gas, and the doping of an N element enables the nano lamellar graphite to be disordered and filled with a large number of defects, so that the nano lamellar graphite is certainly induced to generate new performance, and the nano lamellar graphite can be widely applied to wave absorption and other fields.

A preparation method of WO3 hydrate nano-film, firstly adding tungsten powder into hydrogen peroxide solution and after the reaction is over, collecting the filtrate in the beaker as solution A; adding deionized water to solution A and diluting to obtain solution B ; The substrate is activated by ultrasonic vibration in water and absolute ethanol in turn; the B solution is poured into the microwave hydrothermal reaction kettle, and then put into the activated substrate, and the temperature control mode is selected for the reaction, and after the reaction is completed, it is naturally cooled to room temperature; open the hydrothermal reactor, take out the substrate, put it into an electric heating blast drying oven to dry to obtain a WO3 hydrate nano-film. The invention can quickly prepare the WO3 hydrate nano film with hydrated molecules, because the reaction is completed in one step without subsequent treatment, the preparation period is short, the process equipment is simple, the cost is low, the obtained WO3 film has regular morphology, high crystallinity and high purity .

The invention belongs to the technical field of preparation of carbon quantum dot materials, and discloses a method for synthesizing solid carbon quantum dots by gaseous detonation. The method comprises the following specific steps: taking citric acid as a carbon source, taking urea as a nitrogen source, mixing the two substances and tiling into a gaseous detonation tube; sealing the gaseous detonation tube and then vacuumizing; simultaneously heating the gaseous detonation tube to 60 DEG C or above; respectively filling the inner part of the gaseous detonation tube with hydrogen and oxygen asa detonation source; stopping heating the gaseous detonation tube and detonating hydrogen and oxygen mixed gas in the tube; after the gaseous detonation tube is cooled to 80 DEG C or less, opening the gaseous detonation tube and collecting yellow solid on the tube wall, namely the solid carbon quantum dots. The method has the advantages of simplicity, high efficiency, no need of subsequent processing and capability of synthesizing the solid carbon quantum dots on a large scale. The solid carbon quantum dots synthesized by the method disclosed by the invention do not need any matrix, and can emit fluorescence directly under the excitation of an ultraviolet lamp.

The invention provides a horizontal paddle reaction granulator and an operation method thereof. The reaction granulator comprises a base, a motor, a coupler, a gear reducer, a bearing seat, a U-shapedgroove body, an end cover, a top cover, a paddle shaft, a hoop, a paddle and an electric control cabinet, the U-shaped groove body is mainly composed of a U-shaped outer framework and a flexible nonmetal plate. Wherein the end cover is provided with a packing seal box, the inner side of the end cover is provided with a flexible non-metal lining, the top cover is of a segmented structure, the inner side of the top cover is provided with a flexible non-metal lining, the outer surfaces of shaft heads at the two ends of the paddle shaft are lined with flexible non-metal, and the paddle blades areassembled and fixed on the paddle shaft through hoops. According to the technical scheme provided by the invention, material wall sticking and scaling are effectively prevented and reduced, large materials and spherical materials are eliminated, the reaction granulator is sealed and environmentally friendly, reaction granulation is sufficient and rapid, high performance and high efficiency of thereaction granulator are guaranteed, and the manufacturing and operating cost of the equipment is reduced.

The present invention is a low-viscosity epoxy toughening agent based on acrylate and aliphatic amine, which is composed of 1-50 parts of octylamine, 1-50 parts of dodecyl primary amine, 1-50 parts of oil-based primary amine by weight. A product obtained by reacting an amine with 40-100 parts of a diacrylate compound, and the viscosity of the low-viscosity epoxy toughening agent is 50-1000 centipoise. The low-viscosity epoxy toughener of the invention is prepared based on an addition polymerization reaction, and has the advantages of fast reaction, no solvent, no subsequent treatment, and no introduction of other impurities. By adjusting the feeding ratio of primary alkyl amine and diacrylate compound, the molecular weight and viscosity of the toughening agent can be controlled. The prepared epoxy toughening agent has the advantages of significantly reducing the viscosity of epoxy adhesive, good toughening effect and low water absorption. Etc.

The invention relates to a low-viscosity epoxy toughening agent based on acrylate and aliphatic amine. The low-viscosity epoxy toughening agentis a product obtained by reacting the following components in parts by weight: 1-50 parts of octylamine, 1-50 parts of dodecyl primary amine, 1-50 parts of oleyl primary amine and 40-100 parts of diacrylate compound, wherein the viscosity of the low-viscosity epoxy toughening agent is 50-1000 centipoises. According to the invention, the low-viscosity epoxy toughening agent is prepared on the basis of addition polymerization reaction, and has the advantages of rapid reaction, no solvent, no subsequent treatment, no introduction of other impurities and the like; and the molecular weight and the viscosity of the toughening agent can be controlled by adjusting the feeding ratio of the alkyl primary amine to the diacrylate compound, and the prepared epoxy toughening agent has the advantages that the viscosity of an epoxy adhesive is remarkably reduced, the toughening effect is good, the water absorption rate is low and the like.

The invention discloses an improved process method for preparing 5-chlorindanone, and belongs to the technical field of organic synthesis. Chlorobenzene is mixed with anhydrous aluminum trichloride, and 3-chloropropionyl chloride is added to carry out the Friedel-Crafts acylation reaction to obtain 3,4'-dichloropropiophenone, then in anhydrous aluminum chloride / sodium chloride or tri( Under the condition of pentafluorophenyl) borane, the catalyzed ring is closed, and the 5-chlorindanone is obtained by direct rectification after the reaction finishes washing with water. The process of the invention directly distills after washing with water, without subsequent operations, reduces operation steps, shortens production man-hours, saves production costs, greatly improves the extraction effect of products, and increases the yield of products by more than 15%. It can be effectively removed, and the content of the product is increased to more than 99.5%. At the same time, the use of tris(pentafluorophenyl)borane to catalyze the ring closure can reduce the total amount of aluminum trichloride, reduce the ring closure reaction temperature, and reduce the generation of tar. , improving the yield of the product.

A construction method for simultaneously casting two structure columns at a deformation joint comprises the steps that an integrated steel formwork for the two structure columns is customized; two bayonets are arranged at the center position of the inner side face of each side formwork; each inner formwork is customized and is disconnected from the middle, and the disconnected portions are connected through hinges; two structure column steel reinforcement cages are bound on the surface of a bearing platform, two end formworks and a side formwork are installed outside the steel reinforcement cages; two inner formworks are inserted into a gap between the two steel reinforcement cages; a plate-shaped air cushion is inserted into the gap between the two inner formworks; the other side formwork is installed; the air cushion is fully aerated; and concrete of the two structure columns is poured at the same time. The construction method for simultaneously casting the two structure columns at the deformation joint has the beneficial effects that the construction process of the two structure columns can be completed through one-time casting, and therefore the work efficiency can be greatly improved; a chemical solvent is not needed, so that the health of operation personnel cannot be harmed, and environmental protection is facilitated; and the surfaces of the structure columns are flat, follow-up treatment is not needed, and the construction method is convenient and rapid to execute.